639.20  Several attachments.
  Where there are several attachments against the same defendant, they shall be executed in the order in which they were received by the sheriff.
[R60, §3187; C73, §2965; C97, §3892; C24, 27, 31, 35, 39, §12096; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §639.20]